Radiation imagery chemistry: process – composition – or product th – Silver halide colloid tanning process – composition – or product
Patent
1991-07-30
1993-03-23
McCamish, Marion E.
Radiation imagery chemistry: process, composition, or product th
Silver halide colloid tanning process, composition, or product
430222, 430223, 430544, 430566, 430598, 430599, 430600, 430601, 430603, 430606, 430607, 430610, 430611, 430957, G03C 142
Patent
active
051962918
ABSTRACT:
A silver halide photographic material which comprises a support having provided thereon at least one light-sensitive emulsion layer, and which contains in said emulsion layer, or at least one other layer, at least one hydrazine derivative, at least one contrast enhancing agent and at least one redox compound capable of releasing a development inhibitor upon being oxidized. The hydrazine derivative is exemplified by compounds represented by the following formula: ##STR1## wherein R.sub.1 represents an aliphatic group or an aromatic group; R.sub.2 represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an amino group, a carbamoyl group or an oxycarbonyl group; G.sub.1 represents a carbonyl group, a sulfonyl group, a sulfoxy group, ##STR2## or an iminomethylene group; and A.sub.1 and A.sub.2 both represent a hydrogen atom, or, alternatively, one of them represents a hydrogen atom and the other represents an alkylsulfonyl group, an arylsulfonyl group, or an acyl group. The contrast enhancing agent is exemplified by an amine derivative, an onium derivative, a disulfide derivative or a hydroxymethyl derivative. The redox compound is exemplified by compounds represented by the following formula: ##STR3##
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Katoh Kazunobu
Okada Hisashi
Dote Janis L.
Fuji Photo Film Co. , Ltd.
McCamish Marion E.
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